<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        .father {
            width: 200px;
            height: 200px;
            background-color: skyblue;
            margin-top: 100px;
            margin-left: 100px;
        }
    </style>
</head>

<body>
    <div class="father"></div>
    <script>
        var father = document.querySelector('.father')
        console.log(father.offsetLeft);
        console.log(father.offsetWidth);
        console.log(father.style.height);
    </script>
</body>

</html>